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Re: 2000 S-10 Truck 2.2L, Before You Change Your Next Fuel Filter?!
Posted to Technical Discussion Forum on 3/24/2002 1 Reply

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Glenn, Here's a description on this straight out of SI2000:

Fuel Composition Sensor Description: The fuel composition sensor (FCS), or flex fuel sensor (service parts term), measures the ethanol-gas... Login to read more.

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